Solve the problem.Murrel's formula for calculating the total amount of rest, in minutes, required after performing a particular type of work activity for 30 minutes is given by the formula R(w) = 
, where w is the work expended in kilocalories per min. A bicyclist expends 5 kcal/min as she cycles home from work. Find R'(w) for the cyclist; that is, find R'(5).
A. 6.12 min2/kcal
B. 7.35 min2/kcal
C. 8.57 min2/kcal
D. 4.9 min2/kcal
Answer: A
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Use the table or graph to answer the question.Amy graphed her utility bills for the last year for her records. Estimate the total amount Amy paid for her utilities for the month of January.
A. $75 B. $125 C. $85 D. $105
Divide.(-40) ÷ (-5)
A. -9 B. 8 C. -8 D. 9
Solve the problem.Strontium 90 decays at a constant rate of 2.44% per year. Therefore, the equation for the amount P of strontium 90 after t years is P = P0 e-0.0244t. How long will it take for 15 grams of strontium to decay to 5 grams? Round answer to 2 decimal places.
A. 4.50 years B. 450.25 years C. 40.50 years D. 45.03 years.
Use the graph to find the vertical asymptotes, if any, of the function. 
A. x = -1, x = 1 B. x = -1, x = 1, y = 1 C. x = -1, x = 1, x = 0 D. x = -1, x = 1, x = 0, y = 1